Speaker
            Dr
    Yu Meng
            
                (CHEP, Peking University)
        
        
    Description
The two-photon decay process ηc→2γ can provide an ideal testing ground for the understanding of nonperturbative nature of QCD. In this study, we propose a direct method to calculate the matrix element of a hadron decaying to two-photon. Various systematic effects are examined in this work. The method developed here can also be applied for other processes which involve the leptonic or radiative particles in the final states.
            Primary author
        
            
                
                        Dr
                    
                
                    
                        Yu Meng
                    
                
                
                        (CHEP, Peking University)